How many instructions are there on x86 today?

assembly x86 64-bit intel amd-processor
user2214913 picture user2214913 · Apr 10, 2013 · Viewed 10.2k times · Source

I am trying to learn up to date x86 assembly all from old 386 base instructions through all the sse additions up until now.

I read some things like SSE5 counts 170 new instructions - and I became urged to know how many of them there are presently in total.

Some may say that it's hard to count (because some of them are close, but work on different type arguments), but I think they can be counted with some reasonable assumptions on how to count multiples as one. So could anybody provide an answer to that?

The best answer would be the table of how many instructions in each processor extension it was.

Answer

redblackbit picture redblackbit · Apr 10, 2013

Have a look here, this listing should give you an idea on how many instructions were added to each x86 architecture.

In any case there is no better reference than the official Intel® 64 and IA-32 Architectures Software Developer’s Manual.

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